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Consequences of elevated temperatures on life-history traits of an introduced fish, pumpkinseed Lepomis gibbosus

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Life-history reactions of a pumpkinseed Lepomis gibbosus population in north-eastern France exposed to heated waters were studied. The study was conducted from 2001 to 2003 in an artificial reservoir, adjacent to a nuclear power plant, in which water temperatures are cool in winter (8·2–12·4° C) and rise early in spring (April: 14·7° C) nearly 5° C and 3° C over the temperature of its tributary, respectively. Fast growth among young-of-the-year, precocious maturity and short life span were observed, in contrast to related studies. The short life span appeared to be the price paid for early maturity in breeding fish, which suffered high mortality rates just after their first reproduction.

Keywords: Lepomis gibbosus; global warming; longevity; reproductive strategy; sexual maturation

Document Type: Regular Paper


Affiliations: 1: Laboratoire Biodiversité et Fonctionnement des Ecosystèmes, UFR Sci. F.A., Université de Metz, Rue du Général Delestraint, 57070 Metz, France 2: Conseil Supérieur de la Pêche, Délégation régionale Champagne Ardennes, Lorraine, Alsace, 23 rue des Garennes, 57155 Marly, France

Publication date: 2006-08-01

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